NEXCERA is a low thermal expansion cordierite ceramic designed for applications requiring excellent dimensional stability under temperature changes. With an extremely low coefficient of thermal expansion, it helps minimize thermal deformation and maintain precision in demanding optical, semiconductor, metrology, and high-temperature applications
Jundro specializes in the precision machining of ultra-low thermal expansion cordierite, providing customized components for semiconductor manufacturing equipment, precision optical systems, coordinate measuring machines (CMMs), telescopes, and other high-precision applications.Based on customer drawings, we can machine cordierite substrates, blocks, mirror blanks, and complex structural components, including custom profiles, mounting holes, positioning holes, slots, curved surfaces, and other intricate features. Precision grinding, polishing, and optical-grade finishing are also available.
The table below lists the property parameters of ultra-low thermal expansion cordierite ceramics. These values are for reference only and may vary slightly depending on batch conditions.
| Part Number | N113B | N117B | N118C | N119C | CD107 | |
|---|---|---|---|---|---|---|
| Color | black | black | blue-grey | light blue-grey |
blue-grey | |
| Bulk Density | g/cm³ | 2.5 | 2.55 | 2.58 | 2.5 | 2.57 |
| Flexural Strength | MPa | 210 | 230 | 220 | 166 | 230 |
| Young's Modulus | GPa | 130 | 140 | 140 | 130 | 143 |
| Specific Stiffness | GPa/(g/cm³) | 52 | 55 | 54 | 52 | 55 |
| Fracture Toughness | MPa・m¹ᐟ² | 1.2 | 1.2 | 1.4 | 1.3 | 1.4 |
| Hardness | GPa | 8.0 | 8.1 | 8.1 | 8.0 | - |
| Coefficient of Thermal Expansion | X10⁻⁶/℃ 23℃ | < 0.03 | < 0.03 | < 0.05 | < 0.05 | < 0.03 (Measured at 22℃) |
| Thermal Conductivity | W/mK | 3.7 | 4.2 | 4.5 | 4.3 | 4.7 |
| Relative Permittivity | (1MHz) | 4.7 | 6.0 | 4.7 | 4.4 | 4.6 |
Zerodur glass is one of the low thermal expansion materials currently widely used in precision optics, semiconductor equipment, and precision metrology. It offers excellent thermal stability and dimensional stability. As the requirements for equipment precision and thermal stability continue to increase, ultra-low expansion cordierite, as a new alternative material, is gradually being used in some precision equipment and optical structures, providing a new material option to replace microcrystalline glass.
Macor is a machinable glass-ceramic made from fluorophlogopite mica crystals embedded in a borosilicate glass matrix. This composition gives it a rare
combination of metal-like machinability, excellent electrical insulation, low thermal conductivity, and stability up to 1000°C (no load) while maintaining very tight tolerances.
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